◎ SET INCLUDES

Model No. SB-NM1025

MEASURINGTOOLS BOOK
Niigata Seiki Co., Ltd.
5-3-14, Tsukanome, Sanjo, Niigata, Japan, 955-0055
Tel. : +81-256-33-5522 Fax. : +81-256-33-5518

MAIL intl.sales@niigataseiki.co.jp
URL http://www.niigataseiki.co.jp

1909

Calipers are the most versatile measuring tool inthe shop, able to measure outside dimensions,inside dimensions, depth, and step height.

How toHold

1. Loosen
Lock Screw

010

CALIPERS◇ Model：MC105-25◇ Meas. Range：0～25mm◇ Graduations：0.01mm◇ Instrument Error：4µm◇ Accessories：Spanner● Please read and follow these instructions. Improper use may lead to
accidents, injuries, product damage, or inaccurate measurements.
●Use only for measuring. ●Handle with care - do not drop or shock, anddo not place under heavy objects. ●Do not damage gauge, such as byengraving name or number on it. ●Keep away from rain, high humidity,
temperature extremes, and direct sunlight during use and storage.
●Do not disassemble or modify. ●Use caution when handling Caliper Jaw tips are sharp. ●Always make sure Lock Screw is loose before
moving Caliper Slide.

INSTRUCTION MANUAL

I396-KOUTSIDE MICROMETER◇ Model：GVC-10◇ Max Meas. Length：100mm◇ Graduations：0.05mm◇ Accuracy：±0.05mm

SAFETY NOTESVERNIER CALIPER GVC-10 AND MICROMETER MC105-25
COMBINATION SETノギス

VERNIER CALIPERS

2030

2. Lightly
gasp theBeam

0.10

40.200 .450.30 .50600 .6.700 .90③080

Lock Screw

01020１ Outside

01030

2030504040506070806090070

3. Place thumbon Grip

Beam8090010Main Scale

90

4. Adjust theSlide②

Inside Jaws

70.8２ Inside

３ Step

100 mm0.05mm

Thumb Grip

④Depth BarSlideVernier Scale①１

Outside Jaws

４ DepthPositioning on Workpiece●For Flat Parts

Jaws
at 90°The measurement using both the Main Scale and the Vernier
Scale. Below there are examples reading 77.00mm measurementin the first example, and 77.35mm. for the second example.

Jaws should be perpendicular to the surface.

●For Cylindrical Parts

Meas. = Reading Off Main Scale + Vernier

Jaws should be at rightangle to the axis of thecylinder.

The Vernier Scale is read at the point where the Vernier
graduations align with the Main Scale graduations.

0２

Reading the Scale

31020

Viewing the Scale

300

Read the Scale from directly
above the Calipers.
If the Scale is viewed atan angle, the difference inheight between the Main
Scale and the Vernier Scale
may cause measurement
error due to parallax.

1050402030

40050

6060107070

20 90 30
8000

Graduations Align Here

Ex.１

Measurement =77.00mm

Ex.２

Measurement =77.35mm

Main Scale 70（1㎜）Vernier（0.05㎜）
Main Scale 70（1㎜）Vernier（0.05㎜）

80

0.05mm5040102030405060

1009060708070900800.05mm(Measurement shown in figure is 28.05mm)

800102080010100903040306070809001009020504050607080

900Reading
77＋ 0.00
77.00
Reading
77＋ 0.35
77.35

MICROMETER

Micrometers use a threaded Spindle to measure length for more accuracy
than measurements made with Calipers.

Anvil (Fixed Side)Part
Measuredhere

SpindleMeasuringSurfaces(Carbide)

RatchetStop

ThimbleThermalShieldSpindle Lock
Ratchet Stop

Frame１How toHoldSleeve

Grip the Micrometer on the Thermal Shield toprevent thermal expansion from body heat, anduse the Ratchet Stop for consistent meas. force.

Thermal Shield

Setting the 0-Point① Clean the Measurement Surfaces

To clean both the Anvil and Spindle
measurement surfaces, place a clean
sheet of paper between them and lightly
close the Micrometer. Pull the paper
across the surfaces to clean. Open theMicrometer to remove the paper.

２Reading the Scale●Reading Example
The Sleeve reading is 7.mm, andthe Thimble reading adds 0.37mm,
for a total measurement of 7.37mm.
Sleeve※Paper may produce dust at the edges, so do not pull
all the way out, but open the Micrometer to remove.

Thimble② Close using Ratchet Stop

The amount of force used to turn theSpindle is critical. Turn the Ratchet
Stop until the Measurement Surfaces
touch and the ratchet clicks 1 to 3times.

The Sleeve reading is 7.5mm, andthe Thimble reading adds 0.37mm,
for a total measurement of 7.87mm.
Sleeve4540

40350535030

Sleeve Reading：7 .
Thimble Reading： .37③ Set the Clamp~５μm OffoClamp④ Insert the Spanner（Rear）
Spanner

To adjust the 0-Point, insert theSpanner into the hole in the sleeve androtate. Make sure the Spanner is firmly
pushed into hole, or it will slip andscratch the scale. Please use care.

⑤ Align the Scale to 0

Here the Scale is aligned to read 0.
Always read the Scale from directly
above, reading at an angle can cause a 2~ 3μm reading error.

530

Sleeve Reading：7 .5
Thimble Reading： .37

Measurement：7 . 37（mm）

In the photo to the left, the 0-Point isoff by about 5 μm, so it is necessary toadjust. First, tighten the Spindle Clampusing the Lever to hold the Spindle inposition.

Thimble45

Measurement：7 . 87（mm）■On the Sleeve, the lower scale is 1mm increments, andthe upper scale is also 1mm increments, but half way
between, so for the two scales there is a line every 0.5mm.
■While the Scale is very easy to read, care must be
taken not to misread the last line, especially on the0.5mm Scale, since if the line is not seen or isneglected the measurement will be off by 0.5mm.

0.5mm Scale※ You can read down to0.01mm using the above
method, but you canalso read down to0.001mm (1 μm) as
shown in this diagram.

【~＋2μm】【~＋1μm】

Sleeve LineThimble454035301mm Scale

Sleeve LineThimble

CALIBRATION
Instruments should be calibrated regularly to insure accuracy.

Wear and repeated use can affect accuracy. We recommend periodic calibration.

⑥ Check Accuracy

The New Shape in Measurement(Mounting on Micrometer Stand）

Place the Micrometer into a Stand.
※ Setting the 0-Point is not sufficient to insure
accurate measurements. This procedure will
check for errors in the pitch of the SpindleThreads caused by wear.

⑦ Check Accuracy

KAIDAN

Introducing

KAIDAN, meaning steps in Japanese, makes the scale graduations more visible.
Improves accuracy of reading and the reading speed of measurements.

（Using Block Gauge）

Place a Block Gage in the Micrometerand measure. The measurement shouldmatch the dimension on the Gauge.
This will confirm the overall accuracy ofthe instrument.

KAIDAN Series

New stepped scale makes for error free 1mm reading at a glance!

KAIDAN

Stepped Scale makes 1mm units
easy to distinguish at a glance!

Center of scale
becomes move visible!